Having survived perilous escapes from war zones, refugees find themselves assailed anew in Europe by germs proliferating in crowded, unsanitary camps that could become outbreak hotspots, infectious disease experts have warned.

Their systems weakened by physical exhaustion, a lack of safe food, clean water and medicine, refugees are sitting-duck targets for entirely preventable diseases that can scar, maim, even kill.

Most of these illnesses have long been relegated to Europe’s past: scabies, measles, tuberculosis, cholera and typhoid fever, concerned doctors and academics told a conference in Amsterdam this weekend.

But several have now reemerged, wreaking havoc among Europe’s bulging migrant settlements, from where they could regain a foothold in the broader population.

“Maybe there is a problem in the future,” warned Turkish infectious disease specialist Hakan Leblebicioglu.

“Regarding tuberculosis ... polio and measles, these should be considered an emerging threat especially for the refugees, the region, and maybe Europe,” he told delegates.

More and more refugees will arrive from countries where such illnesses remain widespread.

This while a growing anti-vaccine movement in Europe has left “gaps in vaccination coverage,” according to Leblebicioglu, and resistance to antibiotics is a growing concern.

Europe has struggled to deal with the influx of refugees from countries in Africa and the Middle East ravaged by war and poverty.

According to refugee agencies, more than a million migrants arrived in the EU last year, and almost 180,000 so far this year — many risking life and limb to cross the ocean in shoddy boats for a long shot at a better life.

Most spend extended periods in camps ill-equipped to deal with the unprecedented influx.

A major problem has been the lack of a coordinated European policy to screen new arrivals for contagious diseases, treat them, and vaccinate widely, the conference heard.

“It’s very different in different countries. There’s no pan-European standard,” infectious diseases lecturer Nicholas Beeching of the Liverpool School of Tropical Medicine told AFP.

Screening happens randomly, “may not be based on much evidence, and may be a partly political response,” he said.

Experts presented evidence of disease outbreaks in refugee camps: measles in France and Turkey, scabies in the Netherlands, salmonella in Germany, and MRSA — a drug-resistant skin infection — in Switzerland.

The causes were multifold, explained Leblebicioglu.

“They live in unsanitary conditions, crowded populations, there is a problem with garbage accumulation in some countries.”